Mercury Grand Marquis Transmission Problems & Cost | 4R75E / 4R70W

The Mercury Grand Marquis was equipped with the 4R75E or 4R70W transmission. But they aren’t without their problems though, so let’s look at some of the most common Mercury Grand Marquis transmission problems, look at cost estimates and figure out what you can do about them.

Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.

What Transmission Do I Have?

Mercury Grand Marquis Transmission Models

Mercury Grand Marquis: 4R75E / 4R70W Transmission

Mercury Grand Marquis Transmission Replacement Cost Estimate

Pricing varies by model. To be 100% sure on pricing, have your VIN# handy and use our Get An Estimate feature to look up your transmission by VIN#.

Replacement Mercury Grand Marquis Transmission Prices:

TransmissionStreet Smart TransmissionAutozoneAdvance Auto PartsDealer Retail
4R75E/W 4R70W1687188518852839

What are the DTC codes related to Mercury Grand Marquis transmission problems?

Trouble CodeDescription
P0700Transmission Control System (MIL Request)
P0714Transmission Fluid Temperature Sensor Circuit Intermittent P0715
P0715Input/Turbine Speed Sensor Circuit
P0717Input/Turbine Speed Sensor Circuit No Signal
P0720Output Speed Sensor Circuit
P0721Output Speed Sensor Circuit Range/Performance
P0722Output Speed Sensor Circuit No Signal
P0730Incorrect Gear Ratio
P0731Gear 1 Incorrect Ratio
P0732Gear 2 Incorrect Ratio
P0733Gear 3 Incorrect Ratio
P0734Gear 4 Incorrect Ratio
P0766Shift Solenoid 'D' Performance or Stuck Off
P07811-2 Shift
P07822-3 Shift
P0791Intermediate Shaft Speed Sensor Circuit
P0793Intermediate Shaft Speed Sensor Circuit No Signal
P2703Transmission Friction Element D Apply Time Range/Performance

Mercury Grand Marquis Transmission Recalls

None Found

Mercury Grand Marquis Technical Service Bulletins (TSB)

TSB 10-23-7 – Transmission Cooler Leak
2008 – 2011 Mercury Grand Marquis
Problem – It’s not uncommon for a transmission fluid leak to develop on the driver’s side transmission cooler tube
Solution – Replace transmission cooler core

TSB 13-4-23 – 4R75E Transmission – Grinding/Slipping/Loss of Reverse
2008 – 2011 Mercury Grand Marquis
Problem – Some vehicles may experience a grinding/whining noise, unusual vibrations, slipping, and potentially a loss of reverse gear, all resulting from a failure of the planetary gear assembly
Solution – Install planetary upgrade kit and new torque converter

Common Problems with the Mercury Grand Marquis Transmission

TCC Application in 2nd Gear – 4R75E Transmission / 4R70 Transmission
2005 – 2006 Mercury Grand Marquis
Problem – A lack of power after the 1-2 shift can be caused by an un-commanded torque converter clutch application / TCC apply. The P0742 and/or P1742 DTCs may also be stored.
Solution – The #7 check ball inside of the valve body may have worn down to an incorrect size, allowing the torque converter clutch to apply after the 1-2 shift. Replacement of this check ball may solve the problem.

Slipping in All Forward Gears – 4R75E Transmission
2005 – 2006 Ford 4R75E Transmission
Problem – Many 2005 – 2006 Ford vehicles equipped with the 4R75E transmission, may experience excessive slipping in all forward gears. Metal shavings may also be present in the transmission fluid.
Solution – Replace forward clutch drum and update ECU with program 06B06

Lack of Response
Leaking Fluid
Low Fluid
Burning Smell
Grinding or Shaking
Whining, Clunking or Humming
Refuses to Go Into Gear
Torque Converter Issues
Valve Body Issues
Transmission Noisy in Neutral
Gears Slipping
No 3rd or 4th Gear
No 1st or 2nd Gear
No Reverse
Dragging Clutch
Trouble Codes / Check Engine Light

Can I drive with a transmission problem?

If your Mercury Grand Marquis can still make it up and down the road, you might say “It’s fine, I’ll just drive it until I can get it fixed”. But that is not always a good idea, depending on the symptoms. You see, there are a lot of (very expensive) moving parts inside of a transmission, and if something isn’t right, continuing to drive with a transmission problem could damage something else.

How often does a Mercury Grand Marquis transmission need to be replaced?

The overall lifespan of a Mercury Grand Marquis transmission largely depends on how well it was maintained. Factory design flaws also factor into this equation, along with how/how hard you drive. But on average, we’ve seen the Mercury Grand Marquis transmission last for between 130,000-180,000 miles. A high quality replacement transmission however, can last considerably longer if all of the factory design flaws have been addressed and the vehicle has been maintained.

How are Mercury Grand Marquis transmission issues diagnosed?

It is fairly easy to guesstimate what the root cause of your Mercury Grand Marquis transmission problems might be, but you won’t truly know unless you have the right tools and experience. A good mechanic or transmission repair center will be able to connect your truck to a computer and find out which diagnostic trouble codes (DTC’s) have been stored. Once they know what to look for, they can perform a visual inspection to verify the problem.

How is a Mercury Grand Marquis transmission replaced?

In order to replace your Mercury Grand Marquis transmission, the truck has to be lifted from the ground in order to gain access to all of the parts that will need to be unbolted. Then the transmission can be lowered to the ground (typically with a transmission jack), so the new transmission can be installed.

Recommendations for Mercury Grand Marquis transmission issues?

To save time and get back on the road faster, have your 17-digit truck VIN# handy and you can get an online quote for a reman Mercury Grand Marquis transmission here, then find a local shop using our Find a Shop guide to install it for you.

How to Solve Mercury Grand Marquis Transmission Problems

Solution A: Buy a Used Mercury Grand Marquis Transmission

The quickest way to fix your transmission problems is to simply buy a used transmission or used transmission. These can be found at most junk yards, and they often come with a 30-90 day warranty. However, there’s no way to determine the actual condition of the internal components, so you could be spending a bunch of money to have the exact same problems. Plus, that warranty only covers the transmission if it’s defective, not the labor costs that you’ll have to pay.

Solution B: Buy a Rebuilt Mercury Grand Marquis Transmission

Another option would be a rebuilt transmission or rebuilt transmission. A local repair shop will remove your transmission, then install a bunch of new parts during the rebuild. The problem here is, the skills and experience of each transmission rebuilder will vary widely from shop to shop, so you could have problems from something that wasn’t adjusted properly. And the 1-2 year warranty might only cover you at certain transmission repair shops, in a specific geographical area.

Solution C: Buy a Remanufactured Mercury Grand Marquis Transmission

Many owners depend on their vehicle to commute and get things done. Their gasoline engines are designed to go 100’s of thousands of miles, so it makes sense to invest in a remanufactured transmission.

Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.

What Transmission Do I Have?

What Problem Does Your Mercury Grand Marquis Have?

Let us know the year, mileage and problem you’re having as well as any trouble (OBD) codes you’ve found. If you’ve been given a quote or paid for a repair, we’d like to hear about that too!

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11 days ago

Makes squeaking noises in park.

1 month ago

2004 Mercury Grand Marquis GS transmission OD dash light intermittently flashing. Transmission makes right side noise like the when tires run off highway onto washboard warning bumps. This happens going into overdrive and applying accelerator. In other words under load. Cheap code reader sets 0712. Any ideas? Thanks

yard dog
4 months ago

my 1991 grand marquis has only 45500 miles on it.we bought it new.we don’t drive it much,.but now it wont shift into higher feels like it only drives in 2nd gear.

8 months ago

All my gears work fine but want reverse

9 months ago

2002 mercury grandmarquis trans 4r70w. Changed fluid by removing hose on top of radiator.both hoses for supply and return fluid are located on top next to each other.I drained 1 gal fluid from hose and replaced 4 qts of mercon v and changed filter and replaced pan. Started car up and shifted through gears and noticed fluid leak and cant find where. No fluid on pan or hoses nearby or fill tube or anywhere.could I have the cooler hoses reversed as they can easily be done.

Robert Gordon
11 months ago

Can’t go forward have to drive in reverse and it’s backing up slow and shaking

Jason Christopher Putnam
15 days ago
Reply to  Robert Gordon

Did u find out how to fix

alan fpwler
1 year ago

Reverse not working

Paul Hargrove
1 year ago

1993 grand marquee when trans shifts in overdrive rear of car shakes like it went over railroad track I believe torque converter

John Andrews
1 year ago

My 2000 Mercury Grand Marc keeps going into Limp Mode . Check Engine is Not On No Codes Stored . However Traction Control light and ABS are on. How do I diagnose this? Sometimes I can turn Key Off/on real fast while still moving and it will correct itself then goes back to limp mode in a few minutes or less. 4.6 L with a 4R70W Trans

9 months ago
Reply to  John Andrews

My 1997 kept going into Limp Mode also, found out my Catalytics were clogged up, changed them and no more tranny problems for 40,000 plus miles so far…

Joseph Dawkins
2 years ago

My overdrive button wires were touching and sparking at first and the my 1999 grand marquis gs would drive for a little bit then stop the engine would just reeve up.then i let it sit for a while and i can drive it a little more then the same thing happens again.i also replaced my radiator and it had a leak making my car over heat.there was a light whing noise when i crank the car and try to go .i changed the filters and transmission fluid .could it be a solenoid? I dont have a way to get a scanner check .please let me know something asap please.

1 year ago
Reply to  Joseph Dawkins

I got the same issue. How did you resolve?

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